All of the koalas in the photos above are being radio-tracked, and not one of them is wearing a radio-collar. "How?" you may ask.
We have developed a tiny and low impact radio-tracking device for koalas. For many decades, thousands of koalas across Australia have been fitted with radio-collars so that research teams can collect vital information on koala ecology and identify the threats they face.
Collars are approved for use by Animal Ethics Committees across the country and until now there have been no alternatives, however, the collars can weigh 200gm or more and can occasionally cause "collar rub" where an irritation on the koala's neck is ...